CN202432142U

CN202432142U - Multilayer flexible polyamide (PA) plastic environment-friendly oil pipe with low fuel oil permeability

Info

Publication number: CN202432142U
Application number: CN2012200176908U
Authority: CN
Inventors: 梁忠杰; 毛苏英; 潘兴明
Original assignee: Xiamen Typesom Rubber And Plastic Industrial Co Ltd
Current assignee: Xiamen Typesom Rubber And Plastic Industrial Co Ltd
Priority date: 2012-01-16
Filing date: 2012-01-16
Publication date: 2012-09-12
Anticipated expiration: 2022-01-16

Abstract

The utility model discloses a multilayer flexible polyamide (PA) plastic environment-friendly oil pipe with low fuel oil permeability. The oil pipe comprises a multilayer composite hose which is made of polyurethane and PA and comprises a polyurethane inner layer, a PA barrier layer and a polyurethane outer layer sequentially from inside to outside, wherein the outer wall of the PA barrier layer is bonded with the inner wall of the polyurethane outer layer, and the inner wall of the PA barrier layer is bonded with the outer wall of the polyurethane inner layer. PA with extremely fuel oil low permeability is selected to manufacture the barrier layer and the multilayer structure is adopted so that gasoline permeability of the oil pipe can be controlled to be smaller than 15g/M2/Day, and the fuel oil permeability of the oil pipe can meet the strictest evaporative emission standard of American Environmental Protection Agency (EPA), American California Air Resources Board (CARB) and European Union for fuel pipes of medium-sized and small-sized gasoline engines under the premise that service life of the oil pipe is guaranteed. Use reliability and environment protection performance of the oil pipe are improved, and the oil pipe simultaneously has oil resistance, low fuel oil permeability, flexibility and transparency by adopting the structure.

Description

PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe

Technical field

The utility model relates to a kind of fuel pipe, relates in particular to a kind of PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe.

Background technique

Present middle-size and small-size gasoline class motor is (like small-sized non-road motor; Motorcycle engines etc.) or with middle-size and small-size petrol engine is that the equipment of engine is (like mowing machine; Chain saw, generator, Sport Activity Vehicle etc.) in the connection of gasoline line adopt usually by polyurethane system (Polyurethane; Abbreviation PU) the conventional monolayers plastic tubing NBR individual layer that becomes; Although these results' oil pipe has satisfied the requirement of oil resistance, all there is the defective of anti-gasoline penetrating power difference in the compounded rubber pipe of NBR/CSM; In order to reduce the fuel oil permeability, adopt the FKM individual layer basically, FKM/ECO compounded rubber pipe or the multilayer hard tube of processing by fluoroplastic, the former can't process transparent, and the latter lacks flexibility, has limited application area.

The model utility content

The utility model technical problem to be solved provides that a kind of to possess oil resistance simultaneously good, and the fuel oil permeability is low, and is flexible good, and can process transparent PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe.

For solving the problems of the technologies described above; The technological scheme of the utility model is: a kind of PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe; Comprise the MULTILAYER COMPOSITE flexible pipe of processing by polyurethane and PA; Said MULTILAYER COMPOSITE flexible pipe comprises that the polyurethane internal layer, PA barrier layer and the polyurethane that set gradually from inside to outside are outer, and the outer wall of said PA barrier layer and the outer field inwall of said polyurethane are bonding, and the outer wall of the inwall of said PA barrier layer and said polyurethane internal layer is bonding.

As a kind of optimal technical scheme, the thickness of said PA barrier layer is 0.1 ± 0.02mm.

Owing to adopted technique scheme; A kind of PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe; Comprise the MULTILAYER COMPOSITE flexible pipe of processing by polyurethane and PA; Said MULTILAYER COMPOSITE flexible pipe comprises that the polyurethane internal layer, PA barrier layer and the polyurethane that set gradually from inside to outside are outer, and the outer wall of said PA barrier layer and the outer field inwall of said polyurethane are bonding, and the outer wall of the inwall of said PA barrier layer and said polyurethane internal layer is bonding; Between by polyurethane internal layer and polyurethane skin, be provided with the PA barrier layer of processing by PA, can have following several benefits:

1) oil resistance is good; Gasoline directly directly contacts with the inwall of polyurethane inner tube or the outer wall of polyurethane external pipe usually; Because polyurethane inner tube and polyurethane external pipe are processed by polyurethane; Polyurethane has the good characteristics of oil resistance, so the oil resistance of the utility model is good, and can guarantee that the working life of the utility model is longer.

2) the fuel oil permeability is low; Because the PA barrier layer is processed by PA; PA has stronger impermeable ability; Well stoped the gasoline in the polyurethane internal layer to be penetrated into the external world, satisfied U.S. EPA and CARB, improved the reliability and the feature of environmental protection used the strictest discharge vaporization standard of put-put oil pipe.

3) have good ductility, because polyurethane has high flexibility, PA combines still can keep the high flexibility of polyurethane with polyurethane, and the oil pipe of therefore being processed by these two kinds of materials can have good ductility.

4) has the good transparency; Because polyurethane is the good material of the transparency; The PA barrier layer that PA processes is arranged between the polyurethane internal layer and polyurethane skin that polyurethane processes, and the Thickness Design of PA barrier layer is: 0.1 ± 0.02mm makes this oil pipe keep good transparency.

5) simple in structure, easy to process, this oil pipe only adopts three layers of tubular structure, and therefore the PA barrier layer design that PA processes processes very easy in the centre.

6) have wide range of applications, the advantage of traditional oil resistant pipe that this oil pipe has combined to be processed by polyurethane and the multi-layer flexible pipe processed by PA and other materials, and do not have corresponding shortcoming, therefore have wide range of applications.

Description of drawings

Fig. 1 is the utility model embodiment's a longitudinal construction sectional view;

Fig. 2 is the utility model embodiment's a cross sectional representation;

Among the figure: 1-polyurethane is outer; The 2-PA barrier layer; 3-polyurethane internal layer.

Embodiment

Below in conjunction with accompanying drawing and embodiment, further set forth the utility model.In the detailed description below, some example embodiment of the utility model has only been described through the mode of explanation.Undoubtedly, those of ordinary skill in the art can recognize, under the situation of spirit that does not depart from the utility model and scope, can revise described embodiment with various mode.Therefore, accompanying drawing is illustrative with being described in essence, rather than is used to limit the protection domain of claim.

As depicted in figs. 1 and 2; A kind of PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe; Comprise the MULTILAYER COMPOSITE flexible pipe of being processed by polyurethane and PA, said MULTILAYER COMPOSITE flexible pipe comprises polyurethane internal layer 3, PA barrier layer 2 and the polyurethane skin 1 that sets gradually from inside to outside, and the thickness of said PA barrier layer 2 is 0.1 ± 0.02mm; The inwall of the outer wall of said PA barrier layer 2 and said polyurethane outer 1 is bonding, and the outer wall of the inwall of said PA barrier layer 2 and said polyurethane internal layer 3 is bonding.

More than show and described the advantage of basic principle, major character and the utility model of the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.

Claims

1.PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe; Comprise the MULTILAYER COMPOSITE flexible pipe of processing by polyurethane and PA; It is characterized in that: said MULTILAYER COMPOSITE flexible pipe comprises that the polyurethane internal layer, PA barrier layer and the polyurethane that set gradually from inside to outside are outer; The outer wall of said PA barrier layer and the outer field inwall of said polyurethane are bonding, and the outer wall of the inwall of said PA barrier layer and said polyurethane internal layer is bonding.

2. PA fuel oil hyposmosis layer flexible plastics environment protecting oil pipe as claimed in claim 1, it is characterized in that: the thickness of said PA barrier layer PA is 0.1 ± 0.02mm.